fix flake 8 violations

e2e/tests/test_e2e.py

@@ -878,6 +878,7 @@ class K8s:
     def get_volume_name(self, pvc_name):
         pvc = self.api.core_v1.read_namespaced_persistent_volume_claim(pvc_name, "default")
         return pvc.spec.volume_name
+
     def get_effective_pod_image(self, pod_name, namespace='default'):
         '''
         Get the Spilo image pod currently uses. In case of lazy rolling updates